CVE-2025-8262: yarnpkg Yarn hosted-git-resolver.js explodeHostedGitFragment redos

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-07-28 · updated 2026-06-17
Weakness: CWE-400

Description

A vulnerability was found in yarnpkg Yarn up to 1.22.22. It has been classified as problematic. Affected is the function explodeHostedGitFragment of the file src/resolvers/exotics/hosted-git-resolver.js. The manipulation leads to inefficient regular expression complexity. It is possible to launch the attack remotely. The patch is identified as 97731871e674bf93bcbf29e9d3258da8685f3076. It is recommended to apply a patch to fix this issue.

Affected products

yarn: through 1.22.22

References

https://github.com/yarnpkg/yarn/pull/9199
https://github.com/yarnpkg/yarn/pull/9199/commits/97731871e674bf93bcbf29e9d3258da8685f3076
https://vuldb.com/?ctiid.317850
https://vuldb.com/?id.317850
https://vuldb.com/?submit.617393

Get alerted when CVE-2025-8262 or the next vulnerability affects your stack